Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d82554db14b2eec…

MALICIOUS

PDF

53.3 KB Created: 2020-08-24 21:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ade333f1c5d3099547d7f9178f6e6be9 SHA-1: 758f27bfcd2959914a6dd5329bdcfab9f7ef7f4d SHA-256: 2d82554db14b2eec477b7d3833820ef04abc525eec672a2e17497e60caa85bca
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as legitimate academic reports, but the primary link redirects to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection. The document body, though heavily obfuscated, contains the initial lure text and the malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=iot+based+home+automation+system+project+report
    • http://files.lisawebbermusic.com/uploads/1/3/0/7/130776015/6721457.pdf
    • http://tasozo.flowersindublin.com/uploads/1/3/1/4/131454215/xidujasawovab.pdf
    • http://goxugi.pellegrini.store/uploads/1/3/1/3/131380594/dixavufisuvep-toxugupen.pdf
    • http://files.cruisenvacationdeals.com/uploads/1/3/1/4/131453712/035a9312f.pdf
    • http://files.michiganconcretepros.com/uploads/1/3/0/7/130775150/gidumamipamusat.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/algebra_2_transformations_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/jolly_phonics_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/biology_textbook_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/75085903334.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/99607499938.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/bamu_bsc_biotechnology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0435/0997/3147/files/jujinopije.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/falosifuwilipuzopado.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/64892738564.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/kujoxar.pdf
    • https://cdn.shopify.com/s/files/1/0460/6987/4852/files/jarefepadipakudew.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f76.bin
7eb01195c0982e2e5df6a739909d1e6bf215f237e29af46ec1721f859b90f993
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 5536 bytes
font_01_sfnt_off0000a21a.bin
370baa305f520ffa1e7d9505cc9e7da42e98bf94a3e28ef105fc1e729166030e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA21A 11656 bytes